Brace.



, y PATENTBD APR.28,1908. D. Q. WILKINS.- p- BRAGE.

l .APPLIUATION FILEDA APB.. 30, 1907.

7 l? J5 f `To' all ivhom 'it may concern:

DAVID opWILKms or oKLAnoMA, OKLAHOMA.

' BRACE.

Be it known that-I, DAVID O. WILKINS', .a

` `citizen-of the United States, residing at Oklahoma City, in the county of Oklahoma, Okla-` honra., have invented certain newand useful Improvements in Braces," of which the following is a specification, reference being had to the accompanyingdrawings.

My invention relates to improvements in a brace in whichl the handle is adapted to be detached and replaced by others of greater'or less radial swing and the object of my invention is to provide Ian attaching means be tween the cranked handle and the head andsocket ends ofthe brace that will join the several parts in a more efficient and rigid manner. This objectI attain by meansof lthe device illustrated' in theaccompanying drawing, in which Figure 1 is a side elevation of the brace, part being shown in section; Fig. 2 is a crosssection on the line II-II, Fig. l Fig. 3 is a bottom viewof the head attaching means having the sleeve clamp shown in'secton; Fig.- 4 is a perspective view of one end'of the .cranked handles,'showing the crescentshaped key attached thereto; Fig. 5 is a view in perspective of the swiveled'socket clutch .'or nipple adapted to the head end of the brace, andl Fig. 6 is a perspective view of the tapered sleeve adapted tp [it over the tapered portion of the swiveled socket clutch.

In the drawings, lin which each numeral refers to the same part in the several figures, 1 is. the ordinary socket or bit-clamping member at the upper en d of which proiects at'right angles thereto .the taper nlpple or slotted socket 2, rovided in its upper wall with a slot of a wid nipple. form to. that forming a part of the nipple member which carries the pressure-receiving head 5 at the upper end of the spindle 6: The upper nipple member is shown in perslpective in Fig. 5, and comprises a barrel portlon 7 having a centr-al bore 8 and the nipple 9 at rightan les to th barrel 7. Nipple is also provided slotted through to form the U-shaped groove 10. Within the bore 8 is mounted the spindle 6 which is rotatably secured to nipple 9 by means of collar 11, wasl1er12 and screw 13. Midway of the length of nipples 2 and 9 are pin holes 14 and 15, and corresponding Specification of Letters Patent th equal to the bore of the .This nipple is of exactly similar with a central bore and its wall Patent-era Apriias, 1908.

Appneatianmeanprnso,1907.' serrant. 371,683.

thereto in the arms or tongues15 and 16 of the cranked handle 17 Aare threaded holes 18 and 1.9. Referring to Fig. 4,' 20 designates a wedgeshaped protuberance or key which is sh aped on one face to conform to arm or tongue15` of the cranked handle with which it may be ma'de solid by brazing This key is provided with a hole to correspond with the threaded hole 18 and where this cuts the convex survface -key is counter sunk to receive lthe counter sunk head of a screw 21. Screw 21 -is 'provided on its-other end with a smooth pin portion 220i the proper size to t into the i ole 14 of nipple 9. It will thus be seen that the threaded pin 21 may act in a two-fold capacity',f1rst, to secure the wed e-shaped key 2O to the arm 15 should-it not e brazed thereon, and secondly, .to furnish a pin 22 to restrain said arm and key` from slipping lengthwise from `the nipple. y As a serviceable parts of this coupling means in place, anouter taper sleeve 231s used'. As shownv in Figs. y1-

and 3, the inner surface of sleeve 23 is tapered to correspond to the taper on the outer sur- `and efficient means for retaining the variousJ face-of nipple 9 so that when sleeve '23 is driven into place upon the nipple 9, thearms of the cranked handle are compactly and rigidly secured to the said nipples. The coupling members made use of to attach arm 16 to the bit-clamping member are of exactly the same construction as those already disclosed in connection with the arm attaching member of the pressure-receiving head.

Having thus describod'my invention, what I claim as new, and desireto secure by Let-y ters Patent, is 2- 1. In a brace, a coupling for attaching the pressure receiving head to the doublearmed crank said couplingv comprising a nipple carried by the pressure receiving head and provided with slotted taper walls, a coupling member carried. by the double armed l crank and provided with a wedge shaped key attached thereto in such manner as to adapt it to fit into and 4fill the hollow space in said tapered nipple, and a sleeve tapered interiorly to correspond to saidv tapered nipple by whichineans it is adapted to slide on to and clamp the tapered sleeve upon the crank erm.

2. In a brace, the combination with a pressure receivii r head and a crank handle, of a coupling for connecting them 'together said coupling `comprising a slotted hollow taper nipple .having a pin holev therein and journaled u on the pressure receiving head, a wedge-shaped protubrance secured to the arm of said crank handle whereby said crank handle end is adapted to it into and fill the hollow insaid nipple, a vpin rejecting from the end of the crank arm and) adapted to engage with the pin hole-in said nipple, and a taper sleeve movable lon itu'dinally along the axis of the crank arm an nipple whereby the coupling may be made rigid.

3, In a brace, the combination with the pressure receiving head, a bit-chucking member and a double armed crank handle, of hollow slotted nipples swiveled upon the head and bit-chucking members respectively and adaptedto receive the arms of the crank handle, each of said nipples being provided with a pin hole, a pin projecting from each arm of the crank handle and adapted to enga e in said pin hole-to prevent relative longitu ina] movement between nipple and arm and a key rigidly secured to each arm oi the crank handle whereby is prevented a relative rotary movement between said nipples and arms.

4. In a brace, the combination with a pressure receiving head, a bit-chucking member, a double armed crank handle, tapered coupling members carried by the pressure receiving head and bit-chucking members respectively, each of said coupling members being provided with a central bore and having a slot throughout the length of the taper on said coupling whereby it is adapted to receive the arms of the crank handle; keys secured to the arms of the crank handles and reportioned to it into the slots in said clutc members whereby they are prevented turning therein, and a taper sleeve adapted to fit said coupling to make a rigidy joint.

5. In a brace, the combination of' a pressure receiving head, a bit chuck, a double armed crank handle and means lor detachably connecting each oi' the arms of the crank handle to the pressure receiving head and the bit chuck, the said means comprising a hollow slotted coupling member' provided with a pin hole secured to one of said members at right angles thereto, a wedge shaped key secured to the other of said members and fitting the slot of the clutch member, a pin projecting from an arm of the crank handle and adapted to engage the pin hole in the slotted coupling member, and a sleeve sliding upon said slotted coupling member to retain the several parts in position.

6. In a brace having a pressure-receiving head, a bit-chu'cking member and a detachable crank handle with two arms, a clutching means for connecting one of said arms to the pressure-receiving head and the bit-chucking member respectively, the said clutching means comprising a slotted taper nipple having a pin hole therein opposite to the slot, a crescent shaped key seated upon each arm of the crank handle, a threaded pin for securing each key to said arm, said pin extending therethrough and into the pin hole in the slotted nipple; and a taper sleeve adapted to be driven upon the tapered nipple in such manner as to clamp the arm of the crank handle therein.

The foregoing specification signed at Oklahema City, Okla., this 4th day of March, 1907.

DAVID O. WILKINS.

In presence of CrIAs. EDWARD JonNsoN, I. L. PRrc. 

